The Usefulness of Bivalve Stable Isotope Profiles as Environmental Indicators: Data from the Eastern Pacific Ocean and the Southern Caribbean Sea

Quantifying Upwelling and Freshening in Nearshore Tropical American Environments Using Stable Isotopes in Modern Gastropods

“…Geary et al (1992) observed a significantly higher δ 18 O range for a strombid gastropod from the Gulf of Panama (4.5‰) vs one from a Caribbean non-upwelling area (1.5‰). Bemis and Geary (1996) obtained similar results for venerid bivalves. The present study builds upon the work by Bemis and Geary (1996), but rather than analyzing slow-growing bivalves, we analyze fast-growing gastropods to provide high-resolution isotopic profiles.…”

“…Previous studies of modern mollusks from the TEP and SWC have successfully used oxygen isotopes to distinguish upwelling and non-upwelling environments (Geary et al 1992, Bemis andGeary 1996). Geary et al (1992) observed a significantly higher δ 18 O range for a strombid gastropod from the Gulf of Panama (4.5‰) vs one from a Caribbean non-upwelling area (1.5‰).…”

Comparative oxygen and carbon isotopic records of Miocene and recent lacustrine unionid bivalves from Poland

“…Re main ing valves were ex am ined fragmentarily with a lower spa tial res o lu tion to re veal any general iso to pic trend in the pop u la tion (see Ap pen di ces*). A se rial sam pling tech nique was ap plied to de rive a se quence of isotope re cords from the shells (e.g., Bemis and Geary, 1996;Müller-Lupp, 2002;Müller-Lupp and Bauch, 2005).…”

Isotopes (<sup>13</sup>C and <sup>18</sup>O) Geochemistry of Lower Triassic Montney Formation, Northeastern British Columbia, Western Canada

“…The evidence of biogenic CO 2 contribution from isotopic signature is supported by the total organic carbon (TOC) content based on source-rock kerogen (Table 2) C PDB has been used as a proxy of upwelling intensity because upwelling waters are 13 C depleted [11]. [47] assert that the upwelling isotopic effect might be compensated by the effect of planktonic blooms induced by the nutrient enrichment of upwelled water. The present of apatite mineral (Table 2) O SMOW of −5.51‰ to −6.97‰, the dolomite was precipitated in temperatures ~33˚C.…”